diff --git a/journal/Readme.md b/journal/Readme.md
index f8ef754ff85b3b43fdd5505c01589f1ac3edd38d..22aa36ae7eb7ddfba23334b1813ffe2f212b6dab 100644
--- a/journal/Readme.md
+++ b/journal/Readme.md
@@ -51,4 +51,5 @@ A computational document (presentation of data + calculation code):
 ## Jupyter notebook
 
 - careful with cell running, the environment is not changed for other cells. better run the whole document.
-- lsmagic = lists commands useful in some cases (ex. to plot data).
\ No newline at end of file
+- lsmagic = lists commands useful in some cases (ex. to plot data).
+- turning on a language works cell-wide (see %%... in lsmagic output).
\ No newline at end of file